The whole UFO case report:
July 19, 1953; Oak Ridge, Tennessee
At approximately 3:00 P.M., an F-86 aircraft was observed flying over the Oak Ridgeresidential area, making circles at what appeared to be approximately 2,500 or 3,500 feet. The F-86 flew over the area in this manner for approximately ten or fifteen minutes. The witness, together with his wife, observed the aircraft through a pair of six power field glasses. After the aircraft flew in what appeared to be the direction of Knoxville, Tennessee, a black object moved out of a high white cloud, directly over the area the F-86 had been flying. This object began to travel, at a tremendous speed, in a large circle. This action on the part of the unknown object continued for at least five minutes. During the circle of this object, it appeared at times to be in the shape of a cigar and at other times round. (Not listed in neither the BB Unknowns nor the updated catalog by Brad Sparks, this incident was mentioned in the MUFON UFO Journal, Issue No. 205. An Army document was located and is presented by the link below with a transcript.)”
NOTE: The directory contains a U.S. government (U.S. Army) UFO document.
Wikipedia article: “Oak Ridge, Tennessee”:
“Y-12” Area at Oak Ridge, Tennessee